he fallout would only be severe for the first two weeks and hardly noticeable at the end of 14 weeks. Are you saying there would be fallout for 14 weeks or the radiation left on the ground after the fallout wouldn't be enough to cause cancer, birth defects and other such maladies?
The radiation on the ground would be manageable after 14 weeks. Look at Japan. They have thriving metropolises at ground zero and those were much dirtier bombs that we use now.